Furnace construction



Feb. '18, 1930.

R. D. EOLTZ FURNACE CONSTRUCTION Filed Jan. '7, 1924 3 Sheets-Sheet lFeb. 18, 1930.

R, D. FOLTZ FURNACE CONSTRUCTION Filed Jan. 7, 1924 '3 Sheets-Sheet 2Feb. 18, 1930. R. D. F 'OLTZ 1,747,322

FURNACE conswnuqwiou Filed Jan. 7, 1924 3 Sheets-Sheet 3 Patented Feb.,18, 1930 UNITED STATES RAYMOND PATENT OFFICE H D. FOLTZ, EAST ORANGE,NEW JERSEY, ASCIGNOR TO M. H. DEIRICK' COMPANY, OF CHICAGO, ILLINOIS, ACORPORATION OF ILLINOIS A FURNACE CONSTRUCTION Application filed January7, 1924. Serial No. 684,698.

This invention relates to furnace construe? tion, and while adapted'touse in furnaces of different varieties, it is of particular advantage inthe construction of furnaces of con- 5 siderable vertical extent, suchas are adapted for the burning of pneumatically fed pulverized fuel forthe heating of steam boilers.

'The, general purpose ofthe invention is to provide an improvedconstruction especially adapted for use in furnace walls, which willpossess great durability and stability, which will facilitateinstallation and repair, and which will contribute materially to the efficiency of the operation of the furnace. Among the more particular orspecific objects of theinvention are the following:

The provision of a furnace wall construction having a desirableflexiblity and wherein the refractories are maintained against shiftinginwardly or outwardly out of the intended vertical plane;

The provision of a furnace wall construction wherein the heat-resistingrefractories are not required to carry any great portion of the deadload of the structure or excessive J pressures resulting from thermalexpansion;

- The provision of a furnace wall'construction wherein refractories maybe installed, removed or replaced in any limited area without requiringextensive dismantling or removal of all of the refractories above'sucharea;

The provision of a. furnace wall construction which wili afford anarrangement whereby the furnace wall refractories may be safeguardedagainst excessive overheating;

The provision of a construction wherein the entire furnace wall may becarried on structural members in-such fashion that the individualrefractories may have a certain amount of independent movement so as toaccommodate themselves to contraction and expansion in their ownstructure and in the furnace structure as a whole, without produc- "ingdistortion or displacement-of the wall, and

wherein the supporting structural members are afiorded requisite heat ofthefurnace;

' The provision of a furnace construction 'designedto accommodateadmission of air protection from the ing members also are of minimumvariety as to form;

The provision of a construction having to characteristics abovespecified and in which the strength of the wall supporting members isutilized to the best advantage, so that they may be of minimum weight,the supported refractories being carried thereon in such as fashion asto minimize the effect of eccentric loading of the supporting structuralelements a The provision of a construction which admits ofgreatversatility and variety in the 7. design of the furnaces in which it isemployed, and which will have a great range of use without requiringvariation in any ofthe characteristic details of the construction.

Other and further objects of the invention 76 will be pointed outhereinafter, indicated in the appended claims, or obvious to one skilledinthe art upon an understanding of the present disclosure. :For thepurpose of this application I have elected to show herein cerso tainform and details-of furnace construction representative of my invention;it is to be understood however that .theseare here and that thereforethey are not to be regard-' 88 ed as exhaustive of the variations ofthe'invention, nor are they to be given any interpretation such as mighthave the effect of limiting the claims, short of the true and mostcomprehensive scope of the invention in the '90 art.

In the drawings,

Fig. 1 is an elevational view of a portion of a pulverized fuel burningboiler furnace embodying features of my invention, the illustrationshowing the upper portion and front wall of the furnace in sectionalelevation, and portions ofthe side wall in part broken away; I v

Fig. 2 is a part cross section of thefnrnace construction illustrated inFig. 1, the same representing approximately the left-hand half thereoftaken on the line 2-2 but with certain detail elements omitted;

Fig. 3 is a detail in the nature of a fragmentary'section such as mightbe taken on the line 33 of Fig. 2, the same showing one of the Wallhangers in elevation;

Fig. 4 is a detail in the nature of a part sectional elevation of thefront wall of a boiler furnace in which my invention is embodied inanother form;

Fig. 5 is a detail of the construction 11- lustrated in Fig. 4, samebeing in the nature of a cross section taken at the corner or junctionofthe frontwall and side wall of the furnace on the line 55 of Fig. 4;

Fig. 6 is another detail, on a larger scale illustrating certainfeatures of the construction shown in Fig. 4, same being a partsectional elevation of the front wall on the line 6-6 of Fig. 5;

Fig. 7 is a part sectional elevation of a front wall construction for aboiler furnace embodying features of my invention in a further differentform.

Described generally, in one aspect my invertion contemplates theprovision of an external supporting frame made up of structuralelements, including posts or columns which are carried on a suitablefoundation, and having the refractories, which form the gas confiningWalls-of the furnace chamber, supported on this frame and maintainedtherel j in such relationship that they are held against shift-ing,bulging or toppling over in any direction, while at the same time theyare permited certain freedom of individual or relative movement, so thatthey may accommodate themselves to changes in temperature withoutadversely affecting the integrity or form of the furnace wall, or itsassociation with other elements of the installation, such as boilerparts, fuel feeding instrumentalities, etc. The invention has otheraspects, and these, aswell as a more detailed understanding of theforegoing, will be most readily ascertained by reference in detail tothe drawings forming a part of this specification. 1

In the illustrative construction shown in Figs. 1, 2 and 3, the numeral10 designates column members, which very conveniently can be the boilercolumns employed for supporting parts of the boiler installation.Depending on circumstances, of course, the

boiler columns may be supplemented with others to accomplish the purposeof those elements in the present invention. They may be formed ofrolled-steel members supported attheir lower ends on suitablefoundations. As shown in the embodiment illustrated in Figs. 1 and 2,which is a design for a very large and tall furnace, these supportingcolunms may be supplemented, at various mtervals about the area of thefurnace chamber, with other column members 11 in the nature of studcolumns. These may be carried on the supporting columns 10 by means ofstringer beams 12, which are bracketed to the columns 10 adjacent theirlower ends. To the vertical frame members thus afforded by the columns10 and 11 are-secured the transverse or horizontally extending hangersupports 14. These may be formed conveniently of angle bars or Z-bars,boltedto brackets 15 carried by the vertical frame members. Theypreferably are arranged at uniform spacing one above another, and extendin parallel relationship from side to side of the frame structure. Theypresent, toward the furnace chamber, upwardly directed flanges.

J These hanger supports 14 constitute the retaining supports for thetile retaining members or wall hangers 16. These may be formed ascast-iron members in the nature of brackets. They have a tension arm 16terminating in a book 16", and a compression arm 16 terminating in afoot 16 The arms 16 and 16 are connected by a bar portion having lateralmarginalflanges 16". At its lower end, adjacent the arm 16, this barportion and its flanges terminate at a shelf portion 16 projecting atright an Ice to the longitudinal dimension of the anges 16 and in adirection opposite the compression arm 16. The spacing of the supportingmembers 14 is establishedwith reference to the distance between the hookmember 16 and the foot member 16, so that, when the formm is engagedwith one of the members 14, the foot member 16 will be in cooperativerelationship with the inner face'of the sub- ]acent supporting member14. Each of the wall hangers is adapted to carry a number ofslottedrefractory tile 17, the lowermost of which restsupon theshelf 16such tile 1 being shown as provided with depressions to accommodate theshelf. These tile have T-shaped slots, as shown in Fig. 2, whichaccommodate the bar portion of the hanger and the flanges 16. When so"engaged with and supported on a hanger the tile are held in alignmentvertically, but have a limited amount of individual play on the hanger.

The walls of the furnace chamber are built up of groups of refractoriesthus supported on the hangers which are carried on the members 14 andplaced in such relationship collaterally that the sides of therefractories on aligned juxtaposed hangers will make [con tact. Thusthere are provided a number of horizontally arranged seriesof hangerseach supporting a-limited number of refractories with the sides of thelatter in alignment.

The'hangers in vertically adjacent series are arranged in staggeredrelationship, so that the t1le on the hangers in each series breakjoints with the tile on'those in superj acent or subjacent series. As aresult, on each of the supporting members 14 there will be adistribution of the weight of the refractories carried on two of theseries of hangers. As will be seen in Fig. 3, through the tension arm 16the weight of the refractories carried on the hanger is imposed on theupper supporting member 14 as a couple or turning moment tending toswing that member and its supporting columns inwardly. That moment,however, is counteracted by the weight of the tile carried on a hangerin the superjae cent series, which is transmitted to the member 14through the compression arm 16of said superjacent bracket, as a momenttend-V ing to swing that supporting member and its supporting columnsoutwardly. The summative effect, therefore, of the loading of each ofthe supporting members 14 in this fashion, will be simply to subjectthem to a vertical resultant which will be carried by the columns withonly arelatively small net force tending to swing them inward.

The suspension of the refractories in this fashion on the hangers 16permits each' hanger and its group of refractories to have a shiftingmovement relative to those about it, but only in the plane of the wall.Between the uppermost refractories engaged with the flanges 16 of thehangers in one series, and the refractories engaging the shelves 16 of.the hangers in the superjacent series, are inserted refractories '17,and if desired, a thin layer of compressible refractory material 18 toform an expansion joint. 'In

- order to remove and replace any refractory on any one of the hangers16 therefore, it is necessary simply to remove the key brick 17 at thetop of the tier of refractories on that hanger, and thenremove therefractories from the latter, one at a time, by sliding them upwardly onthe flanges 16 and removingthem inwardly through the space afi'orded byremoval of the key'brick. For the purpose of distinction, I may refer tothe refractories 17', which are thus supported on the hangers, but notengaged therewith, as laid refractories.

As a means for controlling eXternaljair circulation over the wallrefractories and their supporting hangers, I surround the furnacechamber with an outer or sheathing wall built up of the brick 19 whichare supported on the members 14, wherefore the portions or sections ofsaid outer-wall which are supported on any of the respective members 14are removable without requiring dismantling of the portions supported onothers thereof. This gives an air space entirely about the refractorywall, and the admission of air and its circulation through said spacemay be controlled by suitable dampers 23 at desired locations. Thisarrangement may be further availed of in connection with admission ofcombustion air into the furnace of normal width. At the points wheresuch narrow refractories are inserted, however, space will be leftbetween them and adjacent refractories, affording communicating ports Pbetween the interior of the furnace chamber and the surrounding airchamber, accommodating the admission of air into the former. By virtueof this arrangement, the introduced air may be given a preliminaryheating incident to its travel through the air chamber, a factor whichis sometimes of importance; and inasmuch as some of that heat is takenfrom the hangers 16, it is to be observed that the arrangement affordsan effective safeguard against overheating of those members and therefractories in contact with them. A suitable exterior finish may beprovided by a cover 20 of plate, bolt- 7 ed to the members 14 or toother suitable transverse members or carried on the column memberslO and11. At the angle junctions of the walls, suitable expansion and packingjoints may be provided by asbestos or other compressible refractorymaterial packed into spaces 21afiorded by suitable formation of I theoverlapping refractories.

. port the arch bars and the refractories suspended thereon. By virtueof such arrangement the arch and the furnace walls are independent ofone another, so that replacement or alterations may be made in onewith-- out necessitating any dismantling of the other.

Constructions embodying the features above described findparticularutility in the tall furnaces such as those designed for the burning ofpulverized fuel which is fed pneumatically, as it is not subjectto anvlimitation whatever in so far as the compression strength of therefractories is concerned. It is of particular advantage thereforeinperreference numeral 26 and they are supported on the horizontallyextending angle members I 27 carried on the column members 28. Each ofth'e hangecmember's 26 has a bottom shelf portion 26 from whichrises-the marginal web flange 26 for engagement in the T- shaped slotsof refractories strung thereon.

. Spaced above the -upper terminus of flange 26 is atop shelf member 26from which rises a flanged lug 26, Refractories strung on the hangerbetween the shelves 26 and 26 will be supported by the latter, and maybe removed after withdrawal of the topmost on'e thereof, which does nothave engagement with the flange 26 Another refractoryis supported on theshelf 26 and anchored in place by the flanged lug 26 which engages inits T-shaped' slot. In such fashion, groups of refractories are retainedby the hangers against movement inwardly or outwardly to 30 an extentsuflicientto displace or change the contour of the wall, though theindividual refractories are permitted the desired amount of independentor relative movement. More- -,over they are supported independently ofthe refractories below them, so that they will remain in place when thelatter are removed. Upon the sections thus supported and retained by thehangers 26, are disposed courses of laid refractories 29, the number ofsuch courses being variable as desired. .While not .directly engagedwith the hangers, these laid refractories nevertheless are retained inposition by those which are directly anchored, and like the latter,- aresupported independently, so thatotherrefractories below their supportingshelves may be removed without necessitating their displacement.Likewise,

refractories-maybe removed from these laid courses without disturbingthose on support- 0 hangers above or below them.

the wall hangers are. designated by the refer- 'ence numeral 36 and areof such vertical extent that they will engage a plurality of thehorizontal supporting members 37 and each will carry a'number of slottedrefractories, supported on the shelf'portion' 36 and retained by the webflanges 36 Interposed laid brick or. refractories are retained by bridgemembers 38 which engage in their T-shaped slots and'contact the ends ofadjacent refractories, to prevent inward dis-' placement of the laidones. 'It will be appreciated that the arrangement 55 described providesa construction wherein a in the embodiment illustrated in Fig. 7'

rigid frame, effectively protected from the high temperature influencesof the furnace, is effective to maintain the wall refractories securelyin proper relationship to preserve the desired form and contour of thecombustion chamber and the proper relationship with other elements ofthe installation. In addition to this, by virtue of the construction,this rigid frame exercises the further useful function of actuallysupporting the refractories in the wall, thus relieving the refractoriesof what might be detrimental weight or compression. This factorcontributes to the period of utility of the refractories, obviates anysacrifice of furnace volume such as might be entailed by necessity forthick supporting. walls, and permits uniform con ductivity through thewall at all different points. Moreover while the refractories aremaintained with stability in the desired structurakrelationship, theyhave great freedom of individual adjustability within the limitsrequisite to accommodate their expansion and contraction with changes intemperature. This is of importance in avoiding disintegration of therefractories such as is likely to result when they are held againstself-adjustment to thermal expansion or other pressure or internalstrains. The great utility of the construction in permittingreplacements'in limited areas without requiring extensive dismantling,will be immediately appreciated. From a commercial standpoint theconstruction possesses a distinct advantage in the fact that a greatvariety of installations may be made with the same forms of refractoriesand hangers, the structural frame members, of course, being fabricatedto meet the requirements of each particular installation. These factorsare of great importance also from the standpoint of maintenance, becauseof the simplicity in making replacements or repairs.

I claim :v

1. A furnace structure comprising column members, transverse framemembers carried thereby one above another, wall hangers supported on theframe members and extending to one side thereof, refractories supportedon the hangers to form wall sections supported independently one aboveanother, certain of said refractories being slotted and having anchoringconnection with the hangers to prevent the refractories shiftinginwardly or outwardly. I

2. A furnace structure comprising supporting columns, transverse framemembers carried therebyn one above another, rows of 'wall hangerssupported on the frame membersat one side thereof and at differentelevations, vertical tiers of refractories supported on the hangers andanchored to the same to form wall sections one above another, and

bricks removably supported on the tiersof-- lit) refractories, saidbricks and wall sections being associated to form a furnace wall.

3. Furnace construction, comprising in combination, supporting columns,transverse frame members carriedthereby, wall hangers carried on saidframe members and arranged in horizontal series with one series aboveanother, shelf portions on the wall hangers, a vertical tier ofrefractories independently supported on each shelf portion and retainedthereon against dislodgment horizontally,

said tiers of refractories being associated collaterally to-form furnacewall sections, and

brick supported on said refractories to form the upper portions of saidwall sections, said brick being removable horizontally.

4. Furnace construction, comprising in combination, supporting columns,transverse frame members carried thereby, wall hangers earned on saidframe members 1n vertical association, shelf portions on the wallhangers,

a vertical tier of refractories independently supportedon each hangerand retained there'' by against dislodgment horizontally, said tiersbeing collaterally associated to form furnace Wall sections, the tiersof refractories in superjacent wall sections breaking joints l withthose in subjacent wall sections.

frame members carried 'therebv at different 5. Furnace construction,comprising in combination, supportingvmembers, transverse elevations,collaterally associated wall hang- .ers carried on s'aidframe members invertically associated series,said hangers having shelf portions,refractories supported on the shelf portions of said hangers inhorizontally I running courses to form vertically associated gaging saidrefractories individually to pre-' wall" sections, said hangers havingparts envent their dislodgment horizontally and a course of horizontallyremovable refractories between adjacent wall-sections.

. 6. In furnace construction, the combination with supporting means, oftransverse frame members, wall hangers supported'incollateralrelationship on said frame members to form horizontal series,said series being arranged one above another, shelf portions on the wallhangers, vertical tiers. of refractories supported on the shelfportions, said tiers being associated to form independently supportedWall sections one above another.

7. In furnace construction, the combination with'supporting members, ofhorizontally extendingframe members arranged one above another, wallhangers'sustained by each of two adjacent frame members,'-each hangerbeingin tension relationship to the upper frame member and incompression relationship to the lower frame member, and refractoriessupported by the hangersfto form wall sec tions.

with supporting means, of frame members carried thereby one aboveanother, wall hang- 8. In furnace construction, the combination erssupported on said frame members and each engaging two thereof to impartinward tension to the upper one and compression outwardly to the lowerone, vertically adjacent hangers imparting respectively tension andcompression stresses to the same supporting member, and refractoriessupported by the respective hangers in association to form wallportions. v

9. In furnace construction, the combination with supporting means, of anupper horizontally extending frame member carried thereby, a lower framemember extending parallel to the upper frame member, verticallyassociated wall hangers, the upper wall hanger supported in tension bythe upper frame member and in compression by the lower frame member, thelower Wall hanger supported in tension on the lower frame member, andrefractories supported by the hangers to form a wall alongside the framemembers.

10. In furnace construction, the combinaextending frame members carriedthereby one above another, a series of wall hangers supported in tensionon one frame member and exerting an outward moment on a second framemember therebelow, a second series of tion with supporting means, ofhorizontally hangers supported in tension on the said sechangersattached at their upper portioiisto one of the frame members and supcited in compression by a second framemem er therebelow, a second seriesof wall hangers attached at their upper portions to said second framemember and su ported in compression by a third frame mem er below' thesame, the hangers of the different seriesbeing arranged in substantiallythe same plane collaterally of the'frame members, and refractories sup.-portedion the hangers of the different series to form uprightfurnacewall sections one bei low another, some of the refractories in thedifferent sections being'anchored to the hangers to prevent theirdislodge'ment therefrom horizontally.

12. In furnace construction, the combination with a supporting framecomprising horizontal members arranged one above another, of wallhangers supported laterally of said frame members in series arranged oneabove another, hangers of the upper series being hooked onto one of theframe members and being held against outward movement by a second framemember therebelow, hangers of the subjacent series being hooked onto thesaid second frame member and being maintained in substantially parallelrelationship by a third frame member below the same, and refractoriessupported by the wall hangers in the respective series to form wallsections arranged one above another collaterally of the frame.

13. In furnace wall construction, thecombination with a frame includinghorizontally extending frame members arrangedbne above another, of'aseries of wall hangers disposed collaterally of the frame andtransmitting inward pressure moments to one of said frame members andoutward pressure moments to a second frame member therebelow, a secondseries of hangers transmitting inward pressure moments to said secondframe member and outward pressure moments to a third frame memberthereb'elow, and refractories supported on the hangers to formwallsections arranged one'above another collaterally of the frame. 1

14:. Furnace construction, comprising in .combination, column members,transverse frame members joining said column members to form aself-sustaining frame structure, wall hangers supported on the framemembers laterally of said frame structure, refractories carried by thehangers to form independently supported wall sections, said wallsections eing associated to form a .furnace chamber wall, and certain ofsaid. refractories being anchored to their supporting hangers to retainthe refractories against displacement inwardly therefrom.

15. Furnace construction, comprising in combination, supporting columnmembers,

transverse frame members joining the same to form a frame structure,wall brackets supported by said frame members at one side thereof andone above another, and refractorles arranged in wall sections supportedby the brackets one above another in association to form a verticalfurnace wall alongside said frame structure.

16. Furnace construction, comprising in. combination, supportingcolumns, transverse frame members joining the same to form a framestructure, wall hangers suspended one above another on said framemembers, refractories arranged to form wall sections sup-. portedindependently one above another by the hangers, said wall sections beingassociated to form a vertical wall of ,a furnace' chamberalongside theframe structure, and a furnace arch supported by said column members asaroof for said furnace chamber.

17. Furnace construction, comprising in combination, supporting columns,transverse frame members supported thereby, wall ,hangers supported onsaid frame members one above another, refractories supported by thehangers to form a vertical wall portion spaced'from the frame members,and a covering wall supported by the frame members in collateralrelationship to said furnace wall to afford an intervening. air chamber.

18. Furnace construction, comprising in combination, supporting columns,transverse frame members connecting the same to form a frame structure,wall hangers suspended on said frame members one above another,refractories supported on the different hangers in association to formthe vertical wallsof a furnace chamber and a cover wall carried by theframe members collaterally of said furnace walls, to afford an airchamber about the furnace chamber.

19. In furnace construction, the combination of horizontally extendingframe members arranged in parallel relationship one above another,vertically extending wall hangers suspended on said frame members atdifferent elevations, a plurality of refractories supported by eachhanger, the refractories on the several hangers being associated to forma vertical furnace wall extending collaterally of the hangers and framemembers, the hangers having portions engaging refractories supported onthem to retain the refractories against displacement horizontally.

wall sections being relatively movable in the plane of the wall.

. 21. In furnacev construction, the combination of frame members,hangers supported thereon in transversely extending rows with the rowsone above another, a stack of refractories supported independently byeach hanger, said hangers having retaining portions engaging therefractories to hold their inner ends in the same general plane, to formthe furnace wall.

22. In furnace construction, the combination of frame members, hangerssupported thereon in transversely extending rows with the rows one aboveanother, a stack of slotted refractories supported independently byeachhanger, said hangers having retaining portions engaging the slottedrefractories to hold their inner ends in the same general plane, to formthe furnace wall, and refractories which are free of the hangersarranged. to close spaces between adjoining stacks.

23. In furnace construction, the combination with frame members, ofhangers supported thereon in. rows one above another, courses ofrefractories supported on the hangersand anchoredthereon with theirinner ends in substantially the same plane to form a furnacc wall, andrefractories resting on top of the anchored courses and removablehorizontally therefrom independently of refractories 'on superjacenthangers.

24. Furnace wall structure comprising, in combinatiom'metallic framemembers, hangers supported thereon in collateral relationship, coursesof refractories supported bysaid hangers and arranged one on top ofanother to form an upright furnacelwall, said courses includingfull-width refractories arranged with their lateral margins in abutairchamber, metallic supporting members I inserted between adjoining wallsec ing columns spaced apart alongside 'thef i v nace and havingfoundation 'suppo'rt1at, t1ein ers secured a) the columns at. difierentriieleva- -ehaimsi e r mmai along one shifting horizontally out of theplane of thel sections, and compressible material insertedbetweenadjacent sections to accommodate ea c shelf portions from,

supporting the inner wall and 'exposed'in the air chamber, said innerwall beinganchored to said supporting members to. prevent itsdisplacement inwardlyof the-furnace chamber, said'inner wall havingchannels therethrough for. admission of air from said air chamber tothe-furnace chamber, whereby circulation of air is induced across themetallic supporting members in the air chamber. I I 26. A furnace wallconstruction comprising a frame having'columns supported on their lowerends and spaced apart in collateral alignment andhorizon'tal shelfportions carried on said columns and arranged at different elevations;wall sections independently supported on said shelf portionsoheaahtgveanother, said wall sections including-refrac .tories having freedom ofmovementonith'e 1 shelf portions and anchored at their outer endsagainst displacement horizontally -f1f(im the shelf portions, andcompressible nateria accommodate expansion.

27. A furnace wall construction comp s'-;

lower ends, horizontally extending mem tions and carrying inwardly.extendingshelf portions, wall sections'supported on the shelf;

Kb th"'d m"' portions one a ove ano er an co pr sin tending flmm the PPev of h bo y refractories arranged one'u'pon anotherand anchored at-thirouter" ends to prevent their pansion and protect the the furnace fire.

28. A furnace wall construction comprising column members standing onend and disposed externally of the furnace wall, upright bers supportedat the inner side thereof,

shelves on said tile retaining members extending toward the furnacechamber and arranged at diflerent elevations, refractory wall sectionsindependently supported onthe tile retaining members one above anotherto form the furnace chamber wall spaced from the sheathing wall by anair chamber, the sheathing wall'afi'ordmg an air inlet for the airchamber and the vfurnace chamber wall affording ports for the passage ofair from the said air chamber into the furnace chamber,

the tile retaining-members being exposed to the air in the air chamber.

30. A structural element for furnace walls, comprising a hanger castingconsisting of a bar portionhaving lateral flanges along one side and ashelf portion projecting beyond said flanges atone 'endand armsprojecting from the opposite side of said bar portion,-

one of said armsfbein formedwith a hook portion atitsouteren and theother of said arms-being formed with a foot portion at its outer end.

31, A structural element for furnace wall construction,consisting of ahanger comprising a bar portion: having a laterally extending'flangealong one side and a shelf projecting beyond vsaid fflange at one endand supporting arms extending from the side of the 1.; beportionjopposite the said flange, the uptc fpper'arm having a hdokportion at its outer end forlengpgement with a support, and the owerarmaving.a'.}ffoot portion at its outer d; foricontact with1a'support.-

"A trji'cturalifelement for furnace wallncomprisinga.bar-like bodyporide andf aishelfportionprojecting beyond said anged: side at":approximately right angles the'fbody portion and an attaching armexported independently on the frame'o'ne above anotherto form a wallfatoneside of the frame, said wall'sections composed of'refractoriesarranged in courses, and tile retaining members affixed to the frame andhaving anchoring engagement with wall refractories to retain themagainst displacement horizontally from the plane of the sections butpermitting thein disengagement by vertical movement toward superposedsections.

34. A. furnace wall construction comprising, in combination, a metallicframe includ- 35. A furnace wall construction comprismg, in combmation,a frame made up of me talhc column members connected by horizontalmembers arranged collaterally of the-furnace chamber, wall sectionssupported independently by the frame one above another,

vertically,

said wall sections composed of refractories arranged in courses, tileretaining members aflixed to the frame and anchoring refractories in thesections against horizontal displacement while permitting them to shifttions being arranged to afford expansion joints accommodating upwardexpansion of the sections relative to refractories of superjacentsections. 7

36. Furnace construction comprising in combination, columns arrangedalong the furnace chamber, horizontal supporting members connected tothe columns and disposed at the side thereof toward the furnace chamber,wall sections carried by the supporting members and arranged one aboveanother to form a portion of the furnace chamber wall, said wallsections being formed of refractories arranged in courses, and tileretaining members aifixed to the supporting members and engaging some ofthe refractories to hold them against displacement horizontally from thewall.

37. A furnace wall construction as speci fied in claim 36 and in whichrefractoriesof adjoining sections are arrangedto afford expansion jointsaccommodating vertical ex pension of one section relative to the other.

38. Furnace wall construction comprising, in combination, astructuralframe including horizontal members, hangers supported on said members inhorizontally running series disposed one above another, said hangershaving shelf portions disposed laterally ofthe frame, and refractoriessupported on said disthe refractories of adjoining secshelf portionsandforming a wall poftion of the furnace chamber, some of the refractoriesbeing anchored to the hangers to hold such refractories againstdisplacement horizontally.

39. Furnace wall construction as specified in claim 38 and including anouter wall supported by the frame in laterally spaced association' withthe furnace chamber wall to afford an intervening air duct.

4L0. A furnace wall construction comprising in combination, a structuralframe including horizontal members,hangers supported on said members inhorizontally running series disposed one above another, said hangershaving shelf portions and lateral flanges disposed inwardly from theframe, and'refractories supported on said shelf portions and forming awall portion of the furnace chamber, some of the refractories beinganchored to said flanges. 1

41. Furnace wall construction comprising, in combination, a structuralframe including horizontal members, hangers supported on said members inhorizontally running series disposed one above another, said hangershaving shelf portions disposed inwardly from the frame, and refractoriessupported on said shelf 7 ortions and forming independently remova lewall sections, one above another, some of the refractories beinganchored to the hangers to hold said refractories against displacementhorizontally.

42. Furnace wall construction as specified in claim 41 and wherein thewall sections are arranged with expansion joints therebetween toaccommodate vertical expansion of the sections.

43. A furnace Wall construction comprising, in combination, a structuralframe including horizontal members arranged collaterally of the furnacechamber, hangers supported on said members and extending therefromtoward the furnace chamber, said hangers arranged in horizontallyrunning series disposed one above another, shelf portions on thehangers, and refractories supported on the shelf portions and forming aportion of the furnace chamber wall, some of the refractories beinganchored to the hangers to hold said refractories against displacementhorizontally. I, 414. In furnace wall construction, the combination witha support, of a hanger having alaterally projecting arm with a hookengaging the support, a shelf at the lower portion of the hanger, andtile. supported on the shelf, whereby the weight of the tile tends toswing the lower portion of the hanger toward the support.

'45. In furnace wall construction a combination as specified in claim 44and wherein some of the tile are anchored to the hanger v46. In furnaceconstruction, the'combination with asupport, of a hanger disposed lat- 1erally of the support and shiftably engaged therewith at its upper end,a shelf projectmg V of the furnace chamber,

U the furnacechamber wall.

.combination, a sheathing wall, a

from the hanger on the side opposite the support, and tile supported onthe shelf so thattheir weight tends to swingthe lower portion of thehangertoward the support.

47. In furnace construction, the combma tion with a support, of a'hangerdepending at the side of the support, said hanger having shiftableconnection at its upper end with the support and lateralabutment withthe support below said connection, a shelf projecting from the hanger onthe side opposite the support, 'and refractories supported on said shelfto form a wall portion spaced.

laterally from the support.

48. In a furnace structure,in combination, a wall supporting framedisposed laterally of the furnace chamber, afurnace chamber wallcomprising sections arranged one above an-' form the furnace chamberwall, means anchoring said sectionsv against displacement horizontallyand a sheathing wall composed of independently supported sectionscarried on'the horizontal members collaterallyv of 50. A furnacestructure rnace chamberwall spaced collaterally from the sheathing wallto afford an intervening air chamber, frame members for supporting thefurnace chamber wall, and metallic members frame members and furnaceconnecting said chamber wall, said metallic members beingv partlyembedded'in the furnace chamber wall and having substantial areasexposed in the air chamber.

51. A furnace ,s'tructure comprising, in

a frame arranged collaterally of the furnace chamber, a sheathing wallsectionally supported on said frame, and a refractory furnace chamberwall sectionally combination,

. supported onsaid frame in collaterally spaced refractory wallrelationship .with the sheathing wall, said having expansion joints be-'tween superposed sections.

52. A furnace wall independently sup comprising, in

structure comprising I a plurality of hangers disposed parallel inselel-sided tile supported by said hangers and arranged in superimposedcourses in association to form a furnace wall portion, said tile havingmedial T-shaped slots at one end in which the hanger flanges areengaged.

' 53. A furnace structure comprising, in combination, columns rangedalong the furnac'e chamber, horizontal frame members connecting thecolumns and disposed one aboveanother, hangers supported laterally bysaid horizontal members, each of the hangers having cooperation with twoof said hori-.

'zontal members, and refractory wall sections supported by the hangersin laterally spaced relationship with said frame'members.

54. In furnace wall constructiomin combination,.a wall supporting frame,a sheathing wall, wall sections independently supported on the frame andassociated to form a furnace chamberwall, said wall sections comprisinigrefractories anchored against horizonta displacement, certain of saidire-- fractories being arranged to afford air inlet ports through thefurnace chamber wall.

55. A furnace structure comprising, in combination, a frame, a sheathingwall, a

furnace chamber wall spaced collaterally from the sheathing wall toafford an intervenin air chamber, said furnace chamber wall eing formedof refractories arranged in. wall sections, metallic members supportedon the frame and supporting adjacent chamber wall sectionsindependently, said metallic members having anchoring connection withrefractories in the wall sections and'hav-.

ing heat radiating portions exposed in the air chamber.

In testimony wherof I have-hereunto subscribed my name.

' RAYMOND D. .FOLTZ.

ries with the series one above. another, said\ hangers having marginalflanges and paral- DISCDLAI M E R 1,747,822.Raym0nd D. Foltz, EastOrange, N. J. FURNACE CONSTRUCTION. Patent dated Februar 18, 1930.Disclaimer filed May 21, 1938, by the assignee, M. H. Detr'ic/Z Company.Hereby enters this disclaimer to claims 1, 2, 3, 7, 14, 15, 17, 23, 26,27, 35, 36, 37, 38, 39, 41, 43, 48,- 49, 50, 51, 53, and 55 of saidLetters Patent.

[Ojficial Gazette June14, 1988

